Modeling the Black Hole Merger of QSO 3C 186

Lousto, Carlos O.; Zlochower, Yosef; Campanelli, Manuela

doi:10.3847/2041-8213/aa733c

Cited by 15 publications

(17 citation statements)

References 45 publications

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“…In addition to our contributions to PTAs collaboration, we plan to search (or at least place constraints) for single "gravitational wave trains" from specific SMBHBs (Zhu et al 2015;Kelley et al 2018). In particular, for sources of a few billion solar masses at z = 1, we expect to reach gravitational strains oscillations of up to h ∼ 10 −14 (see the case of QSO 3C 186 in Lousto et al 2017). Detection of gravitational waves from individual SMBHB (as opposed to the stochastic background) 14 http://www.atnf.csiro.au/research/pulsar/psrcat/ may lead to important clues about the formation and evolution of such sources and can be performed by studying a few very well timed pulsars, like J0437−4715.…”

Section: Pulsar Timing and Gravitational Wavesmentioning

confidence: 99%

Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy

Gancio

Lousto

Combi

et al. 2020

A&A

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Context. The Argentine Institute of Radio astronomy (IAR) is equipped with two single-dish 30 m radio antennas capable of performing daily observations of pulsars and radio transients in the southern hemisphere at 1.4 GHz. Aims. We aim to introduce to the international community the upgrades performed and to show that IAR observatory has become suitable for investigations in numerous areas of pulsar radio astronomy, such as pulsar timing arrays, targeted searches of continuous gravitational waves sources, monitoring of magnetars and glitching pulsars, and studies of short time scale interstellar scintillation. Methods. We refurbished the two antennas at IAR to achieve high-quality timing observations. We gathered more than 1 000 hours of observations with both antennas to study the timing precision and sensitivity they can achieve. Results. We introduce the new developments for both radio telescopes at IAR. We present observations of the millisecond pulsar J0437−4715 with timing precision better than 1 µs. We also present a follow-up of the reactivation of the magnetar XTE J1810-197 and the measurement and monitoring of the latest (Feb. 1st. 2019) glitch of the Vela pulsar (J0835-4510).Conclusions. We show that IAR is capable of performing pulsar monitoring in the 1.4 GHz radio band for long periods of time with a daily cadence. This opens the possibility of pursuing several goals in pulsar science, including coordinated multi-wavelength observations with other observatories. In particular, observations of the millisecond pulsar J0437−4715 will increase the gravitational wave sensitivity of the NANOGrav array in their current blind spot. We also show IAR's great potential for studying targets of opportunity and transient phenomena such as magnetars, glitches, and fast-radio-burst sources.

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Section: Pulsar Timing and Gravitational Wavesmentioning

confidence: 99%

Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy

Gancio

Lousto

Combi

et al. 2020

A&A

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“…A systematic search was carried out and described in [19][20][21][22]. A particularly promising study of 3C186 [23][24][25] is currently underway. Early reviews on this field are given in Refs.…”

Section: Introductionmentioning

confidence: 99%

Kicking gravitational wave detectors with recoiling black holes

Lousto

Healy

2019

Phys. Rev. D

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Binary black holes emit gravitational radiation with net linear momentum leading to a retreat of the final remnant black hole that can reach up to ∼ 5, 000 km/s. Full numerical relativity simulations are the only tool to accurately compute these recoils since they are largely produced when the black hole horizons are about to merge and they are strongly dependent on their spin orientations at that moment. We present eight new numerical simulations of BBH in the hangupkick configuration family, leading to the maximum recoil. Black holes are equal mass and near maximally spinning (| S1,2|/m 2 1,2 = 0.97). Depending on their phase at merger, this family leads to ∼ ±4, 700 km/s and all intermediate values of the recoil along the orbital angular momentum of the binary system. We introduce a new invariant method to evaluate the recoil dependence on the merger phase via the waveform peak amplitude used as a reference phase angle and compare it with previous definitions. We also compute the mismatch between these hangup-kick waveforms to infer their observable differentiability by gravitational wave detectors, such as advanced LIGO, finding currently reachable signal-to-noise ratios, hence allowing for the identification of highly recoiling black holes having otherwise essentially the same binary parameters.

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“…We foresee that the resolution of wandering black holes will also increase within the next few years.Combining these observations, we see that the study of traveling black holes is important in two landscapes. The first one is related to the progenitor of the moving black hole as the result of the merger of two original smaller black holes, as already shown for the candidate QSO 3C 186 in [8]. The second landscape relates to the effects produced by the black hole on the gas around.…”

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confidence: 84%

“…This method suffices to take the strong lensing into account and in a future more sophisticated version, it could help us create a more elaborate model of matter. We should also implement sophistications based on a catalog constructed with the simulations using velocities in a range of more realistic scenarios such as, potentially the candidate QSO 3C 186 [3] [8].…”

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confidence: 99%

Characterizing the velocity of a wandering black hole and properties of the surrounding medium using convolutional neural networks

González

Guzmán

2018

Phys. Rev. D

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We present a method for estimating the velocity of a wandering black hole and the equation of state for the gas around, based on a catalog of numerical simulations. The method uses machine learning methods based on convolutional neural networks applied to the classification of images resulting from numerical simulations. Specifically we focus on the supersonic velocity regime and choose the direction of the black hole to be parallel to its spin. We build a catalog of 900 simulations by numerically solving Euler's equations onto the fixed space-time background of a black hole, for two parameters: the adiabatic index Γ with values in the range [1.1, 5/3], and the asymptotic relative velocity of the black hole with respect to the surroundings v∞, with values within [0.2, 0.8]c. For each simulation we produce a 2D image of the gas density once the process of accretion has approached a stationary regime. The results obtained show that the implemented Convolutional Neural Networks are capable to classify correctly the adiabatic index 87.78% of the time within an uncertainty of ±0.0284 while the prediction of the velocity is correct 96.67% of the times within an uncertainty of ±0.03c. We expect that this combination of a massive number of numerical simulations and machine learning methods will help analyze more complicated scenarios related to future high resolution observations of black holes, like those from the Event Horizon Telescope.Observations of horizon size scale images of supermassive black holes are expected to be possible soon with the Event Horizon Telescope, in particular observations of Sgr A * [1] and M87 [2]. Recent observations have also shown potential black holes wandering across different scenarios in the interstellar medium, which are based on line emission offsets of sources with respect to the center of their host galaxies. A recent example is the radio-loud QSO 3C 186, which is potentially a candidate of a black hole recoil [3]. Other candidates for wandering black holes are NGC 3718 [4], the quasar SDSS 0956+5128 [5] and SDSS 1133 [6]. At a different mass scale there is also the case of the so called Bullet, a potential high velocity feature detected in the W44 supernova remnant [7]. We foresee that the resolution of wandering black holes will also increase within the next few years.Combining these observations, we see that the study of traveling black holes is important in two landscapes. The first one is related to the progenitor of the moving black hole as the result of the merger of two original smaller black holes, as already shown for the candidate QSO 3C 186 in [8]. The second landscape relates to the effects produced by the black hole on the gas around. In this article we study the second problem by analyzing idealized but feasible scenarios of the effects produced by a fast black hole on the gas around it. We set the problem as the accretion of wind and present a method based on deep learning, to study two properties of the system -the velocity of the black hole and the equation of sta...

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Modeling the Black Hole Merger of QSO 3C 186

Cited by 15 publications

References 45 publications

Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy

Upgraded antennas for pulsar observations in the Argentine Institute of Radio astronomy

Kicking gravitational wave detectors with recoiling black holes

Characterizing the velocity of a wandering black hole and properties of the surrounding medium using convolutional neural networks

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